Over-moded operation of waveguide-to-coax transition at 60 GHz

Author

Pardalopoulou, Maria ; Solbach, Klaus

Author_Institution

Hochfrequenztech., Duisburg Univ., Germany

fYear

2004

fDate

27 Sept.-1 Oct. 2004

Firstpage

475

Lastpage

476

Abstract

In the design of a 57-63 GHz MMIC amplifier, a hermetic waveguide-to-coax transition was involved. A relatively large-diameter coaxial glass bead had to be employed, allowing the TE₁₁-mode to propagate from 52 GHz upwards. Measurements showed transmission blocked around 60 GHz, which could be explained as a resonance of the TE₁₁-mode. Conditions for blocking-free operation were analysed and an improved transition was designed, realized and tested which shift the frequency of the TE₁₁ resonance upward outside the band.

Keywords

MMIC amplifiers; coaxial waveguides; hermetic seals; millimetre wave amplifiers; waveguide transitions; 57 to 63 GHz; MMIC amplifier; TE₁₁ resonance frequency shift; TE₁₁-mode propagation; blocking-free operation; coaxial glass bead; hermetic waveguide-coax transition; over-moded operation; transmission blocking; Coaxial components; Conductors; Frequency; Glass; Impedance; MMICs; Resonance; Tellurium; Transmission line theory; Waveguide transitions;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared and Millimeter Waves, 2004 and 12th International Conference on Terahertz Electronics, 2004. Conference Digest of the 2004 Joint 29th International Conference on

Print_ISBN

0-7803-8490-3

Type

conf

DOI

10.1109/ICIMW.2004.1422170

Filename

1422170